#pragma once
#include <../src/mat/impls/baij/seq/baij.h>
#include <../src/mat/impls/aij/mpi/mpiaij.h>
#include <petsc/private/hashmapi.h>

#if defined(PETSC_USE_CTABLE)
  #define PETSCTABLE PetscHMapI
#else
  #define PETSCTABLE PetscInt *
#endif

#define MPIBAIJHEADER \
  PetscInt   *rangebs;                            /* rmap->range/bs */ \
  PetscInt    rstartbs, rendbs, cstartbs, cendbs; /* map values / bs  */ \
  Mat         A, B;                               /* local submatrices: A (diag part), B (off-diag part) */ \
  PetscMPIInt size;                               /* size of communicator */ \
  PetscMPIInt rank;                               /* rank of proc in communicator */ \
  PetscInt    bs2;                                /* block size, bs2 = bs*bs */ \
  PetscInt    Mbs, Nbs;                           /* number block rows/cols in matrix; M/bs, N/bs */ \
  PetscInt    mbs, nbs;                           /* number block rows/cols on processor; m/bs, n/bs */ \
\
  /* The following variables are used for matrix assembly */ \
\
  PetscBool    donotstash;              /* if 1, off processor entries dropped */ \
  PetscBool    subset_off_proc_entries; /* PETSC_TRUE if assembly will always communicate a subset of the entries communicated the first time */ \
  MPI_Request *send_waits;              /* array of send requests */ \
  MPI_Request *recv_waits;              /* array of receive requests */ \
  PetscInt     nsends, nrecvs;          /* numbers of sends and receives */ \
  MatScalar   *svalues, *rvalues;       /* sending and receiving data */ \
  PetscInt     rmax;                    /* maximum message length */ \
  PETSCTABLE   colmap;                  /* local col number of off-diag col */ \
\
  PetscInt *garray; /* work array */ \
\
  /* The following variable is used by blocked matrix assembly */ \
  MatScalar *barray; /* Block array of size bs2 */ \
\
  /* The following variables are used for matrix-vector products */ \
\
  Vec        lvec;        /* local vector */ \
  VecScatter Mvctx;       /* scatter context for vector */ \
  PetscBool  roworiented; /* if true, row-oriented input, default true */ \
\
  /* The following variables are for MatGetRow() */ \
\
  PetscInt    *rowindices;   /* column indices for row */ \
  PetscScalar *rowvalues;    /* nonzero values in row */ \
  PetscBool    getrowactive; /* indicates MatGetRow(), not restored */ \
\
  /* Some variables to make MatSetValues and others more efficient */ \
  PetscInt    rstart_bs, rend_bs; \
  PetscInt    cstart_bs, cend_bs; \
  PetscInt   *ht; /* Hash table to speed up matrix assembly */ \
  MatScalar **hd; /* Hash table data */ \
  PetscInt    ht_size; \
  PetscInt    ht_total_ct, ht_insert_ct; /* Hash table statistics */ \
  PetscBool   ht_flag;                   /* Flag to indicate if hash tables are used */ \
  double      ht_fact;                   /* Factor to determine the HT size */ \
\
  PetscInt   setvalueslen;  /* only used for single precision computations */ \
  MatScalar *setvaluescopy; /* area double precision values in MatSetValuesXXX() are copied*/ \
                            /* before calling MatSetValuesXXX_MPIBAIJ_MatScalar() */ \
  PetscBool      ijonly;    /* used in  MatCreateSubMatrices_MPIBAIJ_local() for getting ij structure only */ \
  struct _MatOps cops

typedef struct {
  MPIBAIJHEADER;
} Mat_MPIBAIJ;

PETSC_INTERN PetscErrorCode MatView_MPIBAIJ(Mat, PetscViewer);
PETSC_INTERN PetscErrorCode MatLoad_MPIBAIJ(Mat, PetscViewer);
PETSC_INTERN PetscErrorCode MatView_MPIBAIJ_Binary(Mat, PetscViewer);
PETSC_INTERN PetscErrorCode MatLoad_MPIBAIJ_Binary(Mat, PetscViewer);

PETSC_INTERN PetscErrorCode MatCreateColmap_MPIBAIJ_Private(Mat);
PETSC_INTERN PetscErrorCode MatCreateSubMatrices_MPIBAIJ(Mat, PetscInt, const IS[], const IS[], MatReuse, Mat *[]);
PETSC_INTERN PetscErrorCode MatCreateSubMatrices_MPIBAIJ_local(Mat, PetscInt, const IS[], const IS[], MatReuse, Mat *, PetscBool);
PETSC_INTERN PetscErrorCode MatCreateSubMatrix_MPIBAIJ_Private(Mat, IS, IS, PetscInt, MatReuse, Mat *, PetscBool);
PETSC_INTERN PetscErrorCode MatGetMultiProcBlock_MPIBAIJ(Mat, MPI_Comm, MatReuse, Mat *);
PETSC_INTERN PetscErrorCode MatIncreaseOverlap_MPIBAIJ(Mat, PetscInt, IS[], PetscInt);
PETSC_INTERN PetscErrorCode MatIncreaseOverlap_MPIBAIJ_Once(Mat, PetscInt, IS *);
PETSC_INTERN PetscErrorCode MatMPIBAIJSetPreallocation_MPIBAIJ(Mat B, PetscInt bs, PetscInt d_nz, const PetscInt *d_nnz, PetscInt o_nz, const PetscInt *o_nnz);
PETSC_INTERN PetscErrorCode MatAXPYGetPreallocation_MPIBAIJ(Mat, const PetscInt *, Mat, const PetscInt *, PetscInt *);

PETSC_INTERN PetscErrorCode MatConjugate_SeqBAIJ(Mat);